Rebar couplers, also known as rebar mechanical splices, are essential components in modern construction for connecting reinforcing bars (rebar) without overlapping. These devices ensure structural integrity, reduce material waste, and streamline construction processes. But how many types of rebar mechanical couplers exist? Let’s explore the primary categories.  

1. Threaded Rebar Couplers

Threaded couplers are among the most common types. They feature internal threads that match the external threads cut onto rebar ends. By screwing the bars into the coupler, a secure, load-bearing connection is achieved. These are ideal for projects requiring precision and high tensile strength.  

2. Grout-Filled Rebar Couplers  

This type involves injecting cementitious or epoxy grout into a sleeve surrounding the rebar ends. The grout bonds the bars to the coupler, creating a robust connection. Grout-filled couplers are often used in seismic-prone areas due to their flexibility and durability under stress.  

3. Swage Rebar Couplers

Swage couplers use a cold-forming process where a metal sleeve is compressed (swaged) around the rebar ends using hydraulic tools. This creates a permanent, high-strength connection without altering the rebar’s surface. They are popular in prefabrication and high-rise construction.  

4. Bolted Rebar Couplers

These couplers utilize bolts or clamps to secure rebar ends within a split sleeve. Bolted systems allow for easy installation and adjustment, making them suitable for temporary structures or projects requiring disassembly.  

5. Tapered Rebar Couplers

Less common but effective, tapered couplers rely on a conical design. The rebar ends are forced into a tapered sleeve, creating friction and mechanical interlock. These are often used in specialized applications requiring compact connections.